MalwarePublished 5 Aug 2026

bigops-tasks-client (npm) · Malicious Code

Affects bigops-tasks-clientSource GCVE Database

Malicious package : remove bigops-tasks-client and rotate any secrets on hosts that installed it.

Data as of 6 Aug 2026, 19:36 UTC

Classification

Malicious package

Published to npm · OSV MAL-2026-12836

What to do

Remove bigops-tasks-client from every project, lockfile and image that pulls it in. Treat any host that installed it as compromised: rotate the credentials, tokens and keys it could read, from a clean machine.

Affected software

Product	Affected	Fixed in
npmbigops-tasks-client	Affected =35.1.2	Fixed in–

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Description

The bigops-tasks-client npm package version 35.1.2 contains malicious code that, upon import, downloads and executes a platform-specific binary from obfuscated Cloudflare Workers endpoints. This binary is saved to temporary directories with filenames mimicking legitimate tools and executed detached from the main process. The package's advertised functionality is unrelated to this behavior, indicating deliberate malicious intent. Any system with this package installed should be considered fully compromised, and all secrets and keys on that system should be rotated immediately. Removal of the package alone may not eliminate the compromise due to potential persistence mechanisms.

Impact

Systems with the bigops-tasks-client package version 35.1.2 installed are fully compromised due to the execution of arbitrary native binaries fetched from attacker-controlled infrastructure. This allows attackers full control over the affected host, potentially exposing all stored secrets and keys. The malicious code runs automatically upon package import, enabling immediate compromise. Removal of the package does not guarantee remediation as the attacker may have established persistence or additional malware.

Defensive guidance

Users should immediately remove the bigops-tasks-client package version 35.1.2 from all systems. All secrets, keys, and credentials stored on affected systems must be rotated from a secure, uncompromised environment. Due to the severity of the compromise, affected hosts should be considered fully compromised and may require full system reimaging or replacement. Monitor for any signs of persistence or additional malicious activity.

Summary

The bigops-tasks-client npm package (version 35.1.2) includes malicious code that triggers on require() by unconditionally loading a compatibility script (_compat.js). This script downloads a platform-specific binary from obfuscated Cloudflare Workers URLs, using DNS TXT record fallback from *.dl.wel1.ru subdomains. The binary is saved to temporary locations on Unix or Windows systems with filenames designed to resemble benign tooling, given executable permissions, and executed in a detached process. Hostnames and asset paths are dynamically assembled at runtime to evade static detection. The package's stated purpose as a 'tasks client' is unrelated to this behavior, indicating the package is a malicious backdoor. The compromise is severe enough that any system with this package installed should be treated as fully compromised.

References

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What to do

Affected software

Description

AI analysisMachine-generated, updated 6 Aug 2026, 19:36 UTC

Technical details

References

Community reviews